Shared communication space invitations

ABSTRACT

A computer-implemented method of providing invitations to a shared communication space, performed by a server system, includes providing the shared communication space, which includes content associated with a set of characteristics, and identifying a user, in accordance with a set of characteristics associated with the user and the set of characteristics associated with the content in the shared communication space. The method further includes sending to the identified user a invitation to participate in the shared communication space, and upon acceptance of the invitation by the user, enabling access by the user to the shared communication space by the user and enabling the user to exchange information with other participants in the shared communication space via the shared communication space.

RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 12/606,998, “System and Method for Impromptu Shared Communication Spaces,” filed Oct. 27, 2009, which is a continuation of patent application Ser. No. 11/170,275, filed Jun. 28, 2005, now U.S. Pat. No. 7,610,287, each of which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

The present invention relates generally to communications within in computer network systems, and in particular to communications among various entities.

BACKGROUND

On-line collaboration tools can permit a community of users to collaborate on projects, share information, meet and discuss issues, and make presentations, all on-line. They can be used with various sizes and types of user communities such as work teams, social networks, and other associations of users. However, a particular user community must be defined and set up by an administrator. The administrator determines and defines the membership of the community as well as members' permissions and rights with respect to a collaboration space. Oftentimes, the administrator will need to modify the membership of the community to reflect various changes in the community and/or permissions with respect to the collaboration space. The administrator also configures and maintains the collaboration space itself. In some instances, the rights and responsibilities of an administrator can be delegated to one or more members of the community. Such collaboration spaces, therefore, tend to require more than an insignificant amount of overhead to set up and maintain.

SUMMARY

According to some embodiments, a server system provides a shared communication space, which includes content associated with a set of characteristics, and identifies a user, in accordance with a set of characteristics associated with the user and the set of characteristics associated with the content in the shared communication space. The server system furthermore sends to the identified user a invitation to participate in the shared communication space, and upon acceptance of the invitation by the user, enables access by the user to the shared communication space by the user and enables the user to exchange information with other participants in the shared communication space via the shared communication space.

BRIEF DESCRIPTION OF THE DRAWINGS

The aspects of the invention as well as features and advantages in addition thereof will be more clearly understood hereinafter as a result of a detailed description of embodiments of the invention when taken in conjunction with the drawings. Like reference numerals refer to corresponding parts throughout the several views of the drawings.

FIG. 1 depicts an environment in which embodiments of the invention can operate.

FIG. 2 is a flow chart of a process for dynamically generating a shared space in accordance with some embodiments of the present invention.

FIG. 3 depicts an exemplary screenshot of a shared space in accordance with some embodiments of the present invention.

FIG. 4 is a block diagram of an exemplary client in accordance with some embodiments of the invention.

FIG. 5 is a block diagram of an exemplary information system in accordance with some embodiments of the invention.

DESCRIPTION OF EMBODIMENTS

According to some embodiments, a set of entities (e.g., including users and/or agents) having a common set of characteristics are identified. The set of common characteristics can include, for example, concurrently doing the same task or related tasks, searching and/or browsing for similar information, messaging on similar topics, composing documents related to similar information, playing related games, and/or having certain profile information. A shared communication space (e.g., a chatroom, web page, or other space) is dynamically created and the entities in the set are invited to participate in the shared communication space. Participation by an entity is governed by a set of communication parameters associated with each user and certain system defined privacy settings. In some embodiments, users can share one or more information items, such as documents, uniform resource locators (URLs), or emails with one or more of the other entities in the shared communication space.

FIG. 1 illustrates an exemplary environment 100 in which some embodiments of the invention may operate. The environment 100 includes one or more clients 102, a communication network 104, and an information system 106. The client 102 can be any of a number of devices (e.g., a computer, an internet kiosk, a personal digital assistant, a cell phone, a gaming device, a desktop computer, or a laptop computer) and can include one or more client applications 108, a client assistant 110, and/or a client memory 112. The client application 108 can be a software application that permits a user to interact with the client 102 and/or network resources to perform one or more tasks. For example, the client application 108 can be a browser (e.g., Firefox) or other type of application that permits a user to search for, browse for, and/or use resources (e.g., web pages and web services) on the client 102 and/or accessible via the communication network 104. The client application 108 can also be a general purpose software application permitting the user to do various tasks on the client 102 (e.g., composing and editing documents). The client application 108 can be other types of general purpose software applications (e.g., a game). The client assistant 110 can perform one or more tasks related to monitoring a user's activities with respect to the client application 108 and/or other applications, searching or browsing for resources (e.g., files) on the client 102, and processing information received from or being sent to an information system 106. The client assistant 110 can be part of the client application 108, available as a plug-in to the client application 108 (provided, for example, from various on-line sources), or provided as a stand-alone program. The client memory 112 can store various types of information including, but not limited to, system information and information about a user.

The communication network 104 can be any local area network (LAN) and/or wide area network (WAN), such as an intranet, an extranet, or the Internet. It is sufficient that the communication network 104 provide communication capability between a client 102 and an information system 106. In some embodiments, the communication network 104 can transport information using the HyperText Transport Protocol (HTTP) via the Transmission Control Protocol/Internet Protocol (TCP/IP). HTTP permits client computers to access various resources on a client 102 and/or available via the communication network 104. The various embodiments of the invention, however, are not limited to the use of any particular protocol. The term “resource” as used throughout this specification refers to any piece of information or service that is accessible via a Uniform Resource Locator (URL) and can be, for example, a web page, a document, a database, an image, or a computational object.

The information system 106 can include a search system 114 for receiving and responding to user search requests and a shared space system 116 for managing shared spaces. The information system 106 can also include a user information database 118, a document system 120, one or more messaging systems 138, and one or more other systems 140, all connected to the search system 114 and the shared space system 116. In some embodiments, one or more of the connections to the search system 114 and the shared space system 116 are made via the communication network 104. The user information database 118 can store one or more user profiles. A user profile can contain information about a user such as the user's preferences with respect to certain types or categories of information and/or terms. Alternatively, or in addition to, a user profile can be stored in a cookie stored on a user's computer (e.g., client 102). A cookie stored on a client 102 can typically comprise one or more name/value pairs and convey information about the state of a web browsing session. The cookie can be provided to the information system 106 as part of a search request or other communication. User profiles can be created in a variety of ways, such as by receiving information from a user and/or by inferring information about a user from the user's computing activities such as browsing, searching, messaging, and use of various software applications (e.g., a word processing application). The document system 120 can include an inverse document index 122 and a document storage system 124.

The index 334 and document database 336 are sometimes collectively called the document database. In some embodiments, “searching the document database” means searching the inverse document index 334 to identify document identifier of documents whose contents are relevant a specified search query or term. The documents corresponding to the document identifiers can be obtained form the document storage system 124. The document storage system 124 can also provide a snippet of a document based on various criteria (e.g., a portion of the document particularly relevant to a search query).

The search system 114 can be used as a search engine for locating resources located on hosts within an intranet, an extranet, and/or the Internet. The search system 114 can include a client communication module 126, a query processing controller 128, a query receipt, processing, and response module 130 and a cache 132. The client communication module 126 can provide for communications between the search system 114 and a client 102. Search queries submitted to the search system 114 by users at one of the clients 102 can be received at the query receipt, processing and response module 130. The queries are forwarded to the query processing controller 128, which manages interactions with the document system 120 to search for documents relevant to the search query. The document system 120 can return a list of documents relevant to the search query as the search results. The query processing controller can request snippets from one or more of the search results. In some instances, one or more of the search results are available from the cache 132. The query receipt, processing and response module 130 can receive information in the form of search results with or without snippets, and format the information to create a response for user submitting the search request.

The shared space system 116 can include a shared space communication module 132, a shared space manager 134, a user information processing module 136, and a shared space memory 137. The shared space communication module 136 can provide for communications between a client 102 and the shared space system 116. The shared space manager 134 can be used to create and maintain one or more shared spaces in accordance with shared space settings. The user information processing module 136 can be used to store and retrieve information from the user information database 118. The shared space memory 137 can store information relating to one or more shared spaces and system information.

The messaging systems 138 can provide for messaging between users and various network entities. For example, the messaging systems 138 can include an electronic message subsystem (e.g., email) and/or an instant message subsystem. The other systems 140 can provide for other network based systems such as web services, file management, image management, product reviews, on-line commerce sites and so on. One or more of the messaging systems 138 and/or other systems 140 optionally can be connected to the communication network directly 104.

FIG. 2 illustrates one exemplary process 200 for creating and enabling shared communication spaces according to some embodiments of the invention. A plurality of users can be identified that share a common set of characteristics (202). As used in this specification, the term “user” refers to various types of entities such as users of client 102 and/or network or server agents. An agent can be an autonomous or semi-autonomous software application that produces and/or consumes information (e.g., a software application that provides information to consumers such as stock prices weather reports). An agent can be located on a client 102 and/or client or server in the network. Although the following discussion uses the term “user” for simplicity, it should be understood that the techniques described apply equally well to agents, as well as other type of network entities.

Users can be identified as sharing a common set of characteristics in a number of ways. For example, users can be identified as sharing a common set of characteristics when they are performing the same or related activities, either directly or indirectly. In some embodiments, the identification is bounded by a time period (e.g., 15 minutes) within which the same or related activities are being performed by the users. The activities can include, for example: submitting the same or related queries to a search system (such as search system 114), browsing and/or searching for information relating to the same or related topics (e.g., topics such as those found in the Open Directory Project, http://dmoz.org), shopping on-line for the same or related items and/or services, browsing within a group of related sites (e.g., sites associated with a directory structure such as the Open Directory Project), browsing the same or related content, and playing the same or a related electronic game. A user's browsing of content can include, but is not limited to, browsing content on a web page, web site, or other any source of content. In some embodiments, a user's activities can be further characterized by identifying that the user is performing one or more activities associated with a particular locality (e.g., a user seeks to purchase an item within a defined geographical area). The activities can include composing, reading or otherwise accessing documents and/or services related to a same or similar topic, messaging to other users on the same or related topic (e.g., emailing to or instant messaging with another user a message whose contents is similar and/or related to a particular topic). In some embodiments, it is sufficient that the users are involved in an activity where a user's computing experience may be supplemented by communicating with other users doing the same or a similar activity.

In some embodiments, mutually identified characteristics can be used to identify users. For example users sharing one or more common interests and/or characteristics (e.g., as might be found in a user profile) can be determined. The interests can include, for example, an identification that the user is interested in one or more topics (such as those found in the Open Directory Project). A user can identify interests and a user's preference toward one or more topics. Certain interests of the user can be inferred from a user's actions. The characteristics of a user can include, for example, age, gender, and geographic location. A user's membership in a group can be used to identify that user with the other members in the group.

The activities a user is performing can be determined in a number of ways. For example, a client assistant 110 can monitor a user's activities with respect to one or more applications, such as a client application 108, and provide information about the user's activities to an information system 106. In another example, an information item (such as a cookie) that is provided along with a search or a resource request to a system (e.g., to the information system 106) can contain a user identifier that can be used to associate the user with the search or request. In yet another example, a user can be logged in to a service (e.g., an instant messaging service or web service) and the service can provide information about the user's activities.

The shared space manager 134 can obtain and/or receive information from various sources (e.g., a client assistant 110) about the activities of various users and determine which users, if any, are sharing a common set of characteristics such as performing the same or similar activities. The various sources from which the shared space manager can obtain and/or receive information can include, but is not limited to, for example, the client 102, the search system 114, the messaging systems 138 and the other systems 140. The shared space manager 134 can obtain and/or receive information with respect to interests shared by a plurality of users (e.g., by querying the user information database 118) to identify those users which share common interests. In some embodiments, the various sources can communicate to the shared space manager 134 an on-line status of the user (e.g., active, inactive, away, or busy).

For the plurality of identified users at 202, shared space settings can be determined for the users. The shared space settings for a user can describe a user's desired communications to and from the shared space with varying degrees of granularity. A user can define (by permitting or prohibiting) what types of information can be received, what types of filtering should be applied to the received information, from which sources information may be received, and to which receivers the user's information can be provided.

The types of information (sometimes referred to in this specification as “information items”) which can be permitted or restricted can fall into two general areas: static information and streaming information. Additionally, archived information of those types can be included, as well as group editing of any of the types.

Static information can include, but it not limited to: text, advertisements, images, news items, map links, product reviews, phone numbers, e-mails, e-mail addresses, web page links, dictionary entries, syndication feeds, blog (web log) events, user polls, search queries, result selections from search results, advertisement selections, and links to files or other content on the client 102. Syndication feeds can provide content distributed from various sources on a network (e.g., the Internet). Typically, syndication can be used for distributing various types of content to a number of receivers simultaneously (e.g., stock prices and weather reports). News items can be news items from one or more sources. Blog events can be events generated from one or more web logs (blogs). User polls can be polls that the user may participate in which may come from a variety of sources. Streaming information can include, but is not limited to: audio, video, chatroom participation, instant messaging, and computer control such as browsing, navigation, mouse location, keyboard events, and screen contents.

A filter can provide a user with a means to restrict certain content based on various criteria (e.g., filtering out adult content). Filters can be user-created or system-provided. A user-created filter can be based on arbitrary criteria (e.g., specific word or word phrases).

A user can describe in the user's shared space settings from which sources information items can be received. A user can, for example, restrict and/or permit information items from an arbitrary set of sources and/or a set based on an arbitrary set of attributes associated with sources (e.g., restricting information originating from sources in the “.prof” top level domain). Similarly, a user can describe in the shared space settings to which receivers the user's information items can be sent. A user can, for example, restrict and/or permit receivers from receiving all or part of the user's information items to an arbitrary set of receivers and/or to a set of receivers based on an arbitrary set of attributes associated with receiver (e.g., permitting information to be provided to users who have a Google Gmail account).

A user's shared space settings can be stored in the user information database 118 and/or the client memory 112. A user's shared space settings can be established during a prior set up session for the user and/or during a transaction as part of an invitation transaction for inviting a user to participate in a shared space (described below). A user can modify the shared space settings at other times. In some embodiments, a user can have different shared space settings for each shared space in which the user is a participant. A user can create default shared space settings that can be applied to new shared spaces to which the user is invited and/or reset shared space settings for one or more current shared spaces to a default state. A system default shared space setting can be established for one or more users. In some embodiments, a user can be permitted to control the sharing of an information item on a per information item basis as that information is about to be shared.

A set of system settings can be created that can apply to one or more shared spaces. The system setting can include constraint or permissions with respect to: certain users; transmissions to a set for receivers larger than a particular size (e.g., as might be done to minimize spam); sending or receiving information based on arbitrary attributes of the information item's content (e.g., a filter); and arbitrary restrictions placed by the users to whom the space has been allocated (e.g., by settings modifiable within the shared space itself). The system settings can be stored in the shared space manager 134.

Referring back to FIG. 2, a shared space can be created (206). A shared space can take a variety of forms. For example, a shared space can be a chatroom, a pop-up window, a separate application window, a shared white board, a web page, or a combination thereof. It is sufficient that the shared space facilitate a one-way and/or two-way exchange of information items among users. The information items displayed in the shared space can include information items relevant to the common set of characteristics and/or information items provided by or selected by users, and other information items. The contents of a shared site can depend on the common set of characteristics. For example, a shared space where the common set of characteristics involves searching for a particular shopping item (e.g., a bicycle), can include for example, a chat space, searches performed by one or more of the users, results from one or more searches for the item, product reviews of the item, links to on-line auctions for the item, links to information on a network (e.g., the Internet or otherwise) relating to the item, advertisements relating to the item, and/or other resources relating to shopping for the item. In another example, a shared space where the common set of characteristics involves searching for information about a particular public company can include links to the company web site, links to on-line articles or news items relating to the company, one or more pieces of information relating to the company's stock price (e.g., a chart), links to the company governmental filings, and so on. Information relating to a shared space can be stored in the shared space memory 137. In some embodiments, one or more user can edit the types of information items displayed in the shared space (e.g., adding news feeds or product reviews).

Once a shared space is created, communications can be enabled for users in accordance with their respective shared space settings and any system settings (208). Users, for example, can be provided an invitation to join a shared space. The invitation can include a link to the shared space and/or instructions for connecting to the shared space. The invitation can include options for the user to create the user's shared space settings with respect to that shared space. The user can have an option to use a default setting. The default setting can be a user's default setting or a system-supplied default setting. As an example of settings, a user can choose to have revealed or to not have revealed the user's email address within the shared space and/or to the other users of the shared space. In another example, a user can choose to receive no advertisements as part the user's participation in particular shared space. Another user, however, can elect to receive advertisements for that same shared space. Accordingly, users may participate and receive information in accordance with their own shared space settings. The display on the client 102 of the shared space can therefore vary from user to user.

FIG. 3 illustrates an exemplary screenshot of a shared space. A shared space window 302 includes a chat area 304, a user identifier area 306, an advertisements area 308 and other information items area 310. The chat area 304 can enable users to communicate with each other via text messages in real time. The user identifier area 306 can include identifiers for the user of the shared space. The information presented about a user, however, can be governed according to the user's shared space settings (e.g., a user may not desire to have his or her email revealed to the other users). The advertisements area 308 can include one or more advertisements relating to the common characteristics of the shared space. In some embodiments, the advertisements can change based on the contents of one or more of the information items being displayed in the window 302. The other information items area 310 can contain one or more information items as described above (e.g., product reviews). Of course, shared space window 302 is merely exemplary and a shared space may contain fewer, more, and/or different areas.

FIG. 4 is a block diagram of a client 400. The client 400 generally includes one or more processing units (CPUs) 402, one or more network or other communications interfaces 404, memory 406, and one or more communication buses 408 for interconnecting these components. The client 400 may optionally include a user interface 410, for instance a display 412 and a keyboard 414. Memory 406 may include high speed random access memory, such as DRAM, SRAM, DDR RAM or other random access solid state memory devices; and may include non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid state storage devices. Memory 406 may optionally include one or more storage devices remotely located from the CPU(s) 402. In some embodiments, the memory 406 stores the following programs, modules and data structures, or a subset thereof:

-   -   operating system 416 that includes procedures for handling         various basic system services and for performing hardware         dependent tasks;     -   a network communication module (or instructions) 418 that is         used for connecting the client 400 other computers via the one         or more communication network interfaces 404 (wired or         wireless), such as the Internet, other wide area networks, local         area networks, metropolitan area networks, and so on;     -   a client application 108 as described above;     -   a client assistant 110 as described above; and     -   a client memory 112 that can include a user's settings and         permissions 420.

Each of the above identified elements may be stored in one or more of the previously mentioned memory devices, and corresponds to a set of instructions for performing a function described above. The above identified modules or programs (i.e., sets of instructions) need not be implemented as separate software programs, procedures or modules, and thus various subsets of these modules may be combined or otherwise re-arranged in various embodiments. In some embodiments, memory 406 may store a subset of the modules and data structures identified above. Furthermore, memory 406 may store additional modules and data structures not described above.

FIG. 5 is a block diagram of an information system 500. The information system 500 generally includes one or more processing units (CPUs) 502, one or more network or other communications interfaces 504, memory 506, and one or more communication buses 508 for interconnecting these components. The information system 500 may optionally include a user interface 510, for instance a display 512 and a keyboard 514. Memory 506 may include high speed random access memory, such as DRAM, SRAM, DDR RAM or other random access solid state memory devices; and may include non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid state storage devices. Memory 506 may optionally include one or more storage devices remotely located from the CPU(s) 502. In some embodiments, the memory 506 stores the following programs, modules and data structures, or a subset thereof:

-   -   an operating system 516 that includes procedures for handling         various basic system services and for performing hardware         dependent tasks;     -   a network communication module (or instructions) 518 that is         used for connecting the information system 500 to other         computers via the one or more communication network interfaces         504 (wired or wireless), such as the Internet, other wide area         networks, local area networks, metropolitan area networks, and         so on;     -   a search system 114, including a client communication module (or         instructions) 126 for communicating with the clients 102 and a         query receipt, processing, and response module (or instructions)         130 for receiving and processing search requests from clients         102; and     -   a shared space system 116, including a shared space manager 134         as described above, a user information processing module (or         instructions) 136 as described above, a shared space         communications module (or instructions) 132 as described, and a         shared space memory 137 including one or more shared spaces 520.

The shared spaces 520 can include, for example, information relating to the shared space such as formatting and display information, a list of users and associated communications settings, and lists of information items which can be displayed in the shared space.

The information system 500 can be connected to the user information database. The user information database 116 can include information about one or more users. A user identifier 522 can be associated with settings and permissions 524, which can define the setting and permissions (as described above) for the user corresponding to the user identifier 522. Ad server 128 can contain one or more advertisements 1020. The ad server 128 can receive input and return advertisements that are relevant to the input. The information item server 130 can include one or more information items 1022. Similar to the ad server 128, the information server 130 can receive input and return information items that are relevant to the input.

Each of the above identified elements may be stored in one or more of the previously mentioned memory devices, and corresponds to a set of instructions for performing a function described above. The above identified modules or programs (i.e., sets of instructions) need not be implemented as separate software programs, procedures or modules, and thus various subsets of these modules may be combined or otherwise re-arranged in various embodiments. In some embodiments, memory 406 may store a subset of the modules and data structures identified above. Furthermore, memory 406 may store additional modules and data structures not described above.

FIGS. 4 and 5 are intended more as functional descriptions of the various features which may be present in one or more servers than as a structural schematic of the embodiments described herein. In practice, and as recognized by those of ordinary skill in the art, items shown separately could be combined and some items could be separated. For example, some items shown separately in FIG. 5 could be implemented on single servers and single items could be implemented by one or more servers. The actual number of servers used to implement an information system how features are allocated among them will vary from one implementation to another, and may depend in part on the amount of data traffic that the system must handle during peak usage periods as well as during average usage periods.

Although one or more of the drawings illustrate a number of logical stages in a particular order, stages which are not order dependent may be reordered and other stages may be combined or broken out. While some reordering or other groupings are specifically mentioned, others will be obvious to those of ordinary skill in the art and so do not present an exhaustive list of alternatives. Moreover, it should be recognized that the stages could be implemented in hardware, firmware, software or any combination thereof.

The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. 

What is claimed is:
 1. A computer-implemented method performed by a server system having one or more processors and memory storing programs executed by the one or more processors for providing communications, the method comprising: providing a shared communication space that includes content associated with a first set of characteristics; receiving a second set of characteristics associated with users that includes user interests inferred from user activities including searches that are performed during a bounded time period, and user interests inferred from a geographic location associated with users; determining that a first user and a second user share the user interests included in the second set of characteristics and inferred from the user activities; identifying the first and second users for participating in the shared communication space based on determining that the user interests associated with the first and second users are related to the first set of characteristics associated with the content in the shared communication space; sending to the first and second users an invitation to participate in the shared communication space, the invitation including settings describing the first user and the second user communicating to and from the shared communication space with varying degrees of granularity; and upon acceptance of the invitation by the first and second users, enabling access by the first and second users to the shared communication space; determining a type of filtering based at least in part on an criterion including word phrases specified by at least one of the first user and the second user; communicating the first user, the second user and other participants in the shared communication space based at least in part on applying the type of filtering to information received by at least one of the first user and the second user; and group-editing an information item in the shared communication space by at least one of the first user, the second user and the other participants.
 2. The method of claim 1, wherein the invitation sent to the first and second users comprises a link to the shared communication space.
 3. The method of claim 1, wherein the shared communication space includes both static content and streaming content.
 4. The method of claim 3, wherein the streaming content comprises video content.
 5. The method of claim 3, wherein the streaming content comprises chatroom content.
 6. The method of claim 1, wherein the second set of characteristics associated with the first user comprises a membership of the first user in a group of users.
 7. The method of claim 1, wherein the second set of characteristics associated with the first user comprises characteristics of online activity by the first user and a membership of the first user in a group of users.
 8. The method of claim 1, wherein the second set of characteristics associated with the first user comprises characteristics identified in accordance with a user profile of the first user.
 9. The method of claim 1, wherein the first and second users are members of a group, and the second set of characteristics associated with the first and second users comprises characteristics associated with other members of the group.
 10. The method of claim 1, wherein identifying the first user comprises identifying the first user in accordance with characteristics of online activity by the first user and the characteristics of the content in the shared communication space.
 11. The method of claim 1, wherein identifying the first user comprises identifying the first user in accordance with characteristics of content accessed by the first user during online activity by the first user and the characteristics of the content in the shared communication space.
 12. A non-transitory computer readable storage medium storing one or more computer programs to be executed by one or more processors of a computer system, the one or more computer programs comprising: instructions for providing a shared communication space that includes content associated with a set of characteristics; instructions for receiving a second set of characteristics associated with users that includes user interests inferred from user activities including searches that are performed during a bounded time period, and user interests inferred from a geographic location associated with users; instructions for determining that a first user and a second user share the user interests included in the second set of characteristics and inferred from the user activities; instructions for identifying the first and second users for participating in the shared communication space based on determining that the user interests associated with the first and second users are related to the first set of characteristics associated with the content in the shared communication space; instructions for sending to the first and second users an invitation to participate in the shared communication space, the invitation including settings describing the first user and the second user communicating to and from the shared communication space with varying degrees of granularity; and upon acceptance of the invitation by the first and second user, instructions for: enabling access by the first and second users to the shared communication space; determining a type of filtering based at least in part on an criterion including word phrases specified by at least one of the first user and the second user; communicating the first user, the second user and other participants in the shared communication space based at least in part on applying the type of filtering to information received by at least one of the first user and the second user; and group-editing an information item in the shared communication space by at least one of the first user, the second user and the other participants.
 13. The non-transitory computer readable storage medium of claim 12, wherein the invitation sent to the first and second users comprises a link to the shared communication space.
 14. The non-transitory computer readable storage medium of claim 12, wherein the shared communication space includes both static content and streaming content.
 15. The non-transitory computer readable storage medium of claim 12, wherein the second set of characteristics associated with the first user comprises a membership of the user in a group of users.
 16. The non-transitory computer readable storage medium of claim 12, wherein the second set of characteristics associated with the first user comprises characteristics of online activity by the first user and a membership of the first user in a group of users.
 17. The non-transitory computer readable storage medium of claim 12, wherein the first and second users are members of a group, and the second set of characteristics associated with the first and second users comprises characteristics associated with other members of the group.
 18. The non-transitory computer readable storage medium of claim 12, wherein the instructions for identifying the first user comprise instructions for identifying the first user in accordance with characteristics of online activity by the first user and the characteristics of the content in the shared communication space.
 19. The non-transitory computer readable storage medium of claim 12, wherein the instructions for identifying the first user comprise instructions for identifying the first user in accordance with characteristics of content accessed by the first user during online activity by the first user and the characteristics of the content in the shared communication space.
 20. A server system for hosting shared communication spaces, comprising: one or more processors; and memory storing at least one program for execution by the one or more processors, the at least one program including instructions for: providing a shared communication space that includes content associated with a first set of characteristics; receiving a second set of characteristics associated with users that includes user interests inferred from user activities including searches that are performed during a bounded time period, and user interests inferred from a geographic location associated with users; determining that a first user and a second user share the user interests included in the second set of characteristics and inferred from the user activities; identifying the first and second users for participating in the shared communication space based on determining that the user interests associated with the first and second users are related to the first set of characteristics associated with the content in the shared communication space; sending to the first and second users an invitation to participate in the shared communication space, the invitation including settings describing the first user and the second user communicating to and from the shared communication space with varying degrees of granularity; and upon acceptance of the invitation by the first and second users, enabling access by the first and second users to the shared communication space; determining a type of filtering based at least in part on an criterion including word phrases specified by at least one of the first user and the second user; communicating the first user, the second user and other participants in the shared communication space based at least in part on applying the type of filtering to information received by at least one of the first user and the second user; and group-editing an information item in the shared communication space by at least one of the first user, the second user and the other participants.
 21. The server system of claim 20, wherein the invitation sent to the first and second users comprises a link to the shared communication space.
 22. The server system of claim 20, wherein the second set of characteristics associated with the first user comprises a membership of the user in a group of users. 